package net.zjitc.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import net.zjitc.common.CustomException;
import net.zjitc.entiy.Category;
import net.zjitc.entiy.Dish;
import net.zjitc.entiy.Setmeal;
import net.zjitc.mapper.CategoryMapper;
import net.zjitc.service.CategoryService;
import net.zjitc.service.DishService;
import net.zjitc.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category>implements CategoryService {
    @Autowired
    private DishService dishService;
    @Autowired
    private SetmealService setmealservice;
    //根据id删除分类，删除前要进行判断
    @Override
    public void remove(Long id) {
        //添加查询条件，根据分类id进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper=new LambdaQueryWrapper<>();
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        int count1=dishService.count(dishLambdaQueryWrapper);
        //如果已经管理，抛出一个异常
        if (count1>0){
            throw  new CustomException("当前分类下关联了菜品，不能删除");

        }
        //查询当前分类是否关联了套餐，如果已经关联，抛出一个业务异常
        LambdaQueryWrapper<Setmeal>setmealLambdaQueryWrapper=new LambdaQueryWrapper<>();
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        int count2=setmealservice.count(setmealLambdaQueryWrapper);
        if (count2>0){
            throw  new CustomException("当前分类下关联了套餐，不能删除");
        }
        //正常删除分类
        super.removeById(id);
    }
}
